We are happy to announce that our flights to and from Salalah Airport will resume tomorrow, Sunday May 27th 2018. The first flight OV001 will depart from Muscat International Airport at 8.00 am. https://t.co/jVkm4yyFAS

Two Indian navy ships have set sail from India to Oman, to help with relief and rescue work as stated in the tweet below.

In line with India's tradition to be the first responder in a crisis situation in neighborhood, two ships of Indian Navy, INS Deepak and INS Kochi, have sailed from Mumbai yesterday. They have humanitarian aid material on board. They are stand by to assist at Salalah if required

The police are closing the Sea street in the Soukara area of the state in #الجازر anticipation of any landslides caused by the rains.
#شرطة_عمان_السلطانية #ميكونو #عمان_مستعدة

Also:

The police are closing the sea road in the Dahrez area of Dhofar Governorate and closing the coastal road in the central governorate to be affected by sea-level rise, and deploying patrols to follow up on various developments caused by the impact of Hurricane #ميكونو #شرطة_عمان_السلطانية

Here's the projected path of #CycloneMekunu over then next few days. It is expected to make landfall at around 10 pm local time on Friday (7 pm UK time). Intense rainfall is expected to cause severe flooding in and around the city of Salalah. pic.twitter.com/R3CuOLmcvE

The centre of Cyclone Mekunu is about 450km from Al Mahra coasts with chances of heavy rain, gale wind, and high waves that about 5-7 meters. Residents of Dahariz and Hafah coasts in the wilayat of Salalah have been evacuated due to a high level of water, according to Oman’s National Emergency Management Centre (ONEHC). Rakhyut Hospital has also been closed.

Cyclone Mekunu hit Yemeni island Socotra late on Wednesday night and is now heading towards Oman.
Yemen high commission declared Socotra as a disaster zone. Seven people were declared missing and hundreds were evacuated from their homes after Cyclone Mekunu hit. Two ships have also been reported as missing in the area.

#Socotra archipelago in #Yemen struggles again with #CycloneMekunu - Winds at a 100 miles per hour producing flash floods and mudslides. Video from today, May 23, 2018.

The latest from the Public Authority for Civil Aviation (PACA) has said that Cyclone Mekunu's storm clouds are 40 km away from the Wilayat of Sadah, Dhofar.

The cyclone is expected to hit Dhofar and Al Wusta coasts on Friday. The public has been urged not to go near wadis or low lying areas.
It is expected to turn into a high-intensity category 2 cyclone within the next 24 hours.

Sultan Qaboos Hospital in Salalah is evacuating all patients, critical cases and dialysis patients are currently being transferred by the Royal Air Force, the Ministry of Health announced.

Cyclone Mekunu is expected to intensify into a Category Two cyclone within the next 36 hours and will make landfall in southern Oman tomorrow (Thursday).

Dhofar Governorate is expected to be severely affected by the storm, and surrounding areas could also experience heavy rain, thunderstorms and strong winds of up to 135kph. Public Authority for Civil Aviation has urged everyone to stay away from the coastline and wadis.

Evacuations of the Helaniyat Islands has already begun.

and is likely to make a landfall in southern Oman and northern Yemen on Thursday.
The Sub-Committee of the NCCD in the Governorate of Dhofar begins the evacuation of the Helaniyat Islands with the participation of the Royal Air Force of Oman. #Markerpic.twitter.com/PMeR7AWvCN